ive synced firefox over the years bookmarks passwords etc i sold my pc bought a new one a year later logged into firefox sync i can see my previous sync's in account management devices but all of my things arent coming back none of my passwords or bookmarks are showing from before
Additional System Details
- User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0
One year is a long time for a Firefox Account to sit unused. Sync was never intended to store a users data for the long term; the idea is to keep the users data updated every time they open Firefox on one of their connected devices. You made no mention of a 2nd device being used with the PC which was sold.
I have a hunch there's more to your problem than what you have stated thus far.